CREATE TABLE IF NOT EXISTS users (
    id         UUID PRIMARY KEY,
    username   TEXT NOT NULL,
    email      TEXT NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE TABLE IF NOT EXISTS refresh_tokens (
    id         UUID PRIMARY KEY,
    user_id    UUID NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    token_hash TEXT NOT NULL UNIQUE,
    expires_at TIMESTAMPTZ NOT NULL,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_refresh_tokens_expires_at ON refresh_tokens(expires_at);

DROP TABLE IF EXISTS refresh_tokens;
DROP TABLE IF EXISTS users;